,AAA,AA,A,BBB,BB,B,D
AAA,0.999475,0.000000,0.000000,0.000000,0.000000,0.000000,0.000525
AA,0.000000,0.999259,0.000000,0.000000,0.000000,0.000000,0.000741
A,0.000000,0.102069,0.873612,0.022718,0.000000,0.000000,0.001602
BBB,0.000000,0.000000,0.042055,0.861308,0.000000,0.083973,0.012663
BB,0.000000,0.000000,0.000000,0.000000,0.733252,0.133374,0.133374
B,0.000000,0.000000,0.000000,0.000000,0.000000,0.870918,0.129082
D,0.000000,0.000000,0.000000,0.000000,0.000000,0.000000,1.000000